Learn Mathematics & Basic Tools — Calculator Tutorials & Guides
15 step-by-step guides for mathematics & basic tools. Master calculation methods with detailed examples and practical tips.
How to Use a Basic Calculator - Step-by-Step Guide
Master add, subtract, multiply and divide on a basic calculator with memory keys, order of operations and examples.
How to Use a Scientific Calculator - Trig & Logs
Master trig, logs, exponents, angle modes and memory/history. Clear steps with practical examples.
How to Plot Functions - Cartesian, Parametric & Polar
Graph functions online: Cartesian, parametric and polar. Learn window/scale selection with worked examples.
How to Use Fractions - Operations & Simplifying
Add, subtract, multiply, divide and simplify fractions. Includes mixed numbers and decimal conversion steps.
How to Calculate Percentages - % Of & % Change
Learn % of, % change and % difference with clear formulas and worked examples you can reuse anywhere.
How to Simplify and Use Ratios - Scaling, Proportions & Examples
Learn how to simplify ratios, scale them up or down, solve proportions, and convert ratios to fractions or percentages with clear, step-by-step examples.
How to Test Primes & Factorise - Methods & Tips
Check primality, build factor trees and generate primes. Learn the sieve of Eratosthenes with examples.
How to Multiply, Invert & Solve with Matrices
Matrix multiplication, determinant, inverse and solving Ax=b explained with clear, worked examples.
How to Solve Linear & Quadratic Equations
Learn substitution, factoring, quadratic formula and elimination with step-by-step worked examples.
How to Use Significant Figures - Rules & Rounding
Count and round significant figures correctly. Apply rules in addition, subtraction, multiplication and division.
How to Convert Binary - Decimal, Hex & Octal
Learn binary conversion to decimal, hex and octal using bit weights and examples, plus two’s complement basics.
How to Use the Suanpan (Chinese) Abacus - Tutorial
Learn the Chinese suanpan (2:5) abacus step by step. Master bead values, complements to 5/10, and fast methods for the four operations.
How to Use the Soroban (Japanese) Abacus - Guide
Step-by-step soroban (1:4) abacus tutorial. Learn bead positions, complements, and efficient methods for addition, subtraction, multiplication and division.
How to Use the Western/School Abacus - Place Value
Teach and learn with a Western place-value abacus. Count, regroup, add and subtract with skip-counting and clear step-by-step activities.
How to Calculate Speed, Distance & Time
Use the speed formula to solve for distance or time with unit conversions and practical travel examples.